Aerial



Feb. 7, 1933. E. w.v WARREN 1,896,927

AERIAL l chanic.

Patented Feb. 7, 1933 Y UNITED STATES EDGAR W. WARREN, 0F GETTYSBUG,PENNSYLVANIA, ASIGNOR TO J. y l OF GETTYSBURG, PENNSYLVANIA f.

PATENT "OFFICE .l

,'Appneaaon med october 7, 1930. serial No.4s7,oe1.

This invention relates to aerials for radio receiving sets, and has forone of its objects to provide an aerialwhich shall be adapted toincrease the'range yand the selectivity of any receiving set, and whichshall be adapted toreduce static interference to the'minimum.

The invention has for a further object to provide an aerial of thecharacter stated which shall bersimple and compact, which shall beadapted to be readily manufactured at a low .cost and Vwhich shall beadapted to be easily erected without the aid of a me- With the foregoingandother objects in viewthe nature of which will appear as thedescription proceeds, the invention consists in the construction,combination and arrangement of parts hereinafter "fully describedandclaimed, and illustrated in the accompanying dra-wing, wherein Figure1 is a sectional view taken on a plane extending vertically and4centrally through the aerial;

Figure 2 is a sectional view taken on the horizontal plane indicated bythe line 2-.2 of Figure 1;

Figure 3 is a sectional view taken on the vertical plane indicated bythe line 3.-3 of Figure 1; y

-Figure 1' isa sectional view taken on the horizontal plane indicated bythe line 4--4 of Figure 1, and

Figure 5 is a sectional view taken on the horizontal plane indicated bythe line 5 5 of Figure 1.

The aerial comprises a tube 1 which may be made of copper or of anyother suitable metal and may be corrugated longitudinally to addstrength and rigidity thereto. The tube 1 is adaptedto be supported inupright position from a roof, p'ole or the like, and is closed at itsupper endby a conical cap 2 and A Vat a point above its lower end by aplug 3. V. The cap 2, whichV is Inade'of Vmetal similar to that vfromwhich the tube-1 is made, surrounds and rests upon the upper end of thetube, and the contacting portions of these partsare soldered together,as at 4, to establish a" water-proof connection between Vthe sa-me. Theplug 3 is arranged within the tube 1,.and issecured in place by screws-5 which pass through the tube and enter the plug.v Thev plug 3 has asnug 'Contact with; the inner surfaceof the tube 15, and any suitablesealing material 6 is arranged betweenV the contacting surfaces ofgtheseparts so as Vto establish a water-.proof connection between the same.Theconnection between the heads of the screws 5V and the tube 1 isrendered water-proof by solder 7 which is applied to the headsandadjacent portions of the tube.

The cap 2 and plug 3 provide the tube 1 with a water-proof chamberVwhich extends throughout the greater'length thereof.

The plug 3 comprises a lower member` 8, an upper member ,9; and. anintermediate member 10. The plug members 8 and 9 may be made of wood,bakelite or the like, and the plug member 10 may be made ofglass or thelike. The plug members 8 and 9 have'a Ysnug fit with the inner surfaceof the tube 1, and the plug 'member 10 is smaller diametrically than theplug members 8 and 9, so as to provide the plug with an annular space 11L. WILLIAMS, 4.

The lplug 3 isprovided at its upper side with metallic clips 12 forthereception of a fixed crystal 13 of the conducting and rectifying type. Acoil 14 of copper or wire isv arrangedv within the tube 1 between thecap 2 and plug 3, and has its upper end soldered, Y asat 15, to the apexof the ca'p2, and vhas auv A the clips 12. A binding post 17 extendsthrough a side of the tube 1 at a point above vthe plug 3, and isadapted to have theleading-in wire `of the receiving set connected 9e Athereto. The binding post 17, which is insulated, as at 18, from thetube 1, is` connected to the other ofthev clips 12 by a lead v19 Y lprovided with an insulatingfjacket. Y

.Y Supporting means forthe aerial coin-prisesV a standard 20 which isscrew'threadedly'engaged at its upper end with a socket'member 21secured by screws 22 to thelower sldeof its lower end soldered, as at.16,4 to one .of Y

23. The 'standard 20 is screw threadedly engaged at its lower end with asocket member 24 which is pivotally connected by abolt 25 to anattaching bracket 26. The socket member 24 and attaching bracket 26 areprovided with ears v27 and 2S forthe reception of the pivot bolt 25.:The attaching bracket 26 may be arranged at any angle to the standard2O necessaryto permit it to besecured by screws 29 to a horizontal.orinclined support, as for instance, the roof 30 of a house or otherbuilding. After the attaching bracket 26 has been secured in place, thenut of the bolt 25 is tightened to ,hold the aerial and standard 2OVagainst rocking movement with respect to the attaching bracket.

Pins 31 extend inwardly'from the tube l adjacent the lowerv end thereof,and Varranged within the tube in' contact with the lower sides lofthepin's is a discl 32 of bakeliteV or other suitable insulatingmaterial. The disc 3l is secured in place by clips 33 fixed to the tube'l and contacting with the lower side of the disc. The disc closes thelower end of the tube l, andis provided with an lopening for Athereception of the standard 20.

A copper wire `is threaded through openings in the `upper .end of .thetube-1 to provide attaching loops 34 arranged at the outer side ofthetube, and the opeiiingsare sealed by solder, as at S35, to prevent thepassage of moisture therethrough. Guy wires 36, prefera'bly of copper,are looped about yand 4soldered to the loops 34, las Iat S37, and .areprovided at their lower ends with `insulators S38. Thekguy wires 36 areelectrically connected to the tube` l and coil 14 and` constitute a partof the aerial and they may be shortened or lengthened when it is.desired'to increase or decrease the effective lengthV .of the aerial.

yZlhefguy wiresQ :are secured'to the insulators 38 .and tothe roof 30. af

' From the foregoing descriptiomrtaken in connection with they:accompanying drawing,

it should be apparent that the .tube l, coil 14 and crystal rectifier 13are `connected in series and that these parts are effectivelylieldagainst .short :circuiting contact and fully Y protected from adverseweather conditions.

It vwill also beunderstood that the Vaerial vis `simple and highlyefficient, and that the suprport therefor permits it to bereadily andrigidly attached to a roof .or the like. y While I have described the'principle Aof the` invention, together the structure whichl nowconsiderV the preferred embodiment thereof, it is to be understood thattheA structure sho-wn "is merely illustrative and that suoli changes maybe made, when desired,L as-fall withintlie scope ofthe invenf tionasclaiined.

I claim I i i te `Aend of fthe tube, an insulating plug within`conductor extending from the Y binding post yto the crystal rectifier`n 1 2. An aerial ,comprising in combination a metal tube, a metalclosure sealed to theupper end of the tube, an insulating plug sealedwithin the tube below its'upper end, a crys# f tal rectifier carriedbythe upper end of the plug, a metal coil within thetube between theclosure and plug and fixed at its upper end to the closure and at itslower :end to the crystal rectifier, a'bindin'g post fixed to andinsulated from `the tube, and 'a conductor extending from the binding'ypost to the crystal rectifier. I 8. An aerial comprising in combinationa metal tube, a metal closure for the upper end of the tube, aninsulating plug/within thetube'below its upper aend, a crystal rec-vtifier carried by the upper side -of the plug, a metal coil withinthetube between thezclosureand plug and fixed at its upperendto the cap:and at Vits lower-end. to the `crystal rectifier', arbinding post fixedto and insulated from the tube, and alconductor'extending from thebinding post to the crystal rectifier and provided with an insulatingjacket.

- 4. An aerial comprising in combination ra metal tube, a metal closuresealed to 'theup- 1 an insulating member arranged between said ,A rfirst insulating vmembers andsmaller/Hthan ma the saine to provideapassage between said first insulating membersfacrystal rectifiercarried by the upper side of the uppermost 1 insulatingy member, a metalcoil within the` tube between the closure and said 'uppermost Yinsulating member andl fix-ed at its :upper end to the closure and atits'lower 'end'to the crystal rectifier, a binding post :fixed to andinsulated from lthe tube, and a conductor extending from` the bindingpost'to'the crys tal rectifier. t i y 5. An aerial comprisingcombination VYa metal'tube having asealed compartment, 'a crystalrectifier arranged within said Lconipartinent and `insulated from thetube, a metal coil withinisaid l.compartmenty and :connected at one endof the tnbeand at the other endv to the crystal rectifier, a'bindingpost fixed to and insulated from the tube, .and a.

6, An Vaerial comprising in fcomb'inatonn Y.

metal tube having a sealed chamber, attaching loops passing through andsealedtothe tube, guy wires securedat certaiii of `their ,t

7. An aerial comprising in combination a metal tube, a metal closure forthe upper end of the tube, an insulating plug withinthe tube below itsupper end, a crystal rectier carried by the upper side of the plug, ametal coil within the tube between the cap and plug and fixed at itsupper end to the cap and at its lower end to the crystal rectifier, abinding post fixed to and insulated from the tube, a conductor extendingfrom the binding post to the crystal rectifier, a supporting member, andmeans secured to 'theplug and detachably engaged with the supportingmember.

8. An aerial comprising in combination a metal tube, a metal closure forthe upper end of the tube, an insulating plug within the tube below itsupper end, a crystal rectiier carried by the upper side of the plug, ametal coil within the tube between the cap and plug and fixed atitsupper end to the cap and at its lower end to the crystal rectifier, abinding post fixed to and insulated from the tube, a conductor extendingfrom the binding post to the crystal rectifier, a supporting member,means secured to the plug and detachably engaged with the supportingmember, and an attaching plate adjustably secured to the supportingmember.

9. An aerial comprising a metal tube, a Y

metal closure for the upper end of the tube, an insulating plug withinthe tube below its upper end, a crystal rectifier carried by the upperside ofthe plug, a metal coil within the tube between the cap and plugand fixed at its upper end to the cap and at its lower4 end to thecrystal rectifier, a binding post fixed to and insulated from the tube,a conductor extending from the binding post to vthe crystal rectifier, asupporting member, means secured to the plug and detachably engaged withthe supporting member, and an insulating member extending across thelower end of the tube and secured to the tube and provided with anopening for the? passage of the supporting member.

In testimony whereof I hereunto affix my signature.

EDGAR W. WARREN.

